(function () {
  // This set of controls performs orbiting, dollying (zooming), and panning.
  // Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
  //
  //    Orbit - left mouse / touch: one-finger move
  //    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
  //    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move

  const _changeEvent = { type: "change" };
  const _startEvent = { type: "start" };
  const _endEvent = { type: "end" };

  class OrbitControls extends THREE.EventDispatcher {
    constructor(object, domElement) {
      super();

      this.object = object;
      this.domElement = domElement;
      this.domElement.style.touchAction = "none"; // disable touch scroll

      // Set to false to disable this control
      this.enabled = true;

      // "target" sets the location of focus, where the object orbits around
      this.target = new THREE.Vector3();

      // How far you can dolly in and out ( PerspectiveCamera only )
      this.minDistance = 0;
      this.maxDistance = Infinity;

      // How far you can zoom in and out ( OrthographicCamera only )
      this.minZoom = 0;
      this.maxZoom = Infinity;

      // How far you can orbit vertically, upper and lower limits.
      // Range is 0 to Math.PI radians.
      this.minPolarAngle = 0; // radians
      this.maxPolarAngle = Math.PI; // radians

      // How far you can orbit horizontally, upper and lower limits.
      // If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
      this.minAzimuthAngle = -Infinity; // radians
      this.maxAzimuthAngle = Infinity; // radians

      // Set to true to enable damping (inertia)
      // If damping is enabled, you must call controls.update() in your animation loop
      this.enableDamping = false;
      this.dampingFactor = 0.05;

      // This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
      // Set to false to disable zooming
      this.enableZoom = true;
      this.zoomSpeed = 1.0;

      // Set to false to disable rotating
      this.enableRotate = true;
      this.rotateSpeed = 1.0;

      // Set to false to disable panning
      this.enablePan = true;
      this.panSpeed = 1.0;
      this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up
      this.keyPanSpeed = 7.0; // pixels moved per arrow key push

      // Set to true to automatically rotate around the target
      // If auto-rotate is enabled, you must call controls.update() in your animation loop
      this.autoRotate = false;
      this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60

      // The four arrow keys
      this.keys = { LEFT: "ArrowLeft", UP: "ArrowUp", RIGHT: "ArrowRight", BOTTOM: "ArrowDown" };

      // Mouse buttons
      this.mouseButtons = { LEFT: THREE.MOUSE.ROTATE, MIDDLE: THREE.MOUSE.DOLLY, RIGHT: THREE.MOUSE.PAN };

      // Touch fingers
      this.touches = { ONE: THREE.TOUCH.ROTATE, TWO: THREE.TOUCH.DOLLY_PAN };

      // for reset
      this.target0 = this.target.clone();
      this.position0 = this.object.position.clone();
      this.zoom0 = this.object.zoom;

      // the target DOM element for key events
      this._domElementKeyEvents = null;

      //
      // public methods
      //

      this.getPolarAngle = function () {
        return spherical.phi;
      };

      this.getAzimuthalAngle = function () {
        return spherical.theta;
      };

      this.getDistance = function () {
        return this.object.position.distanceTo(this.target);
      };

      this.listenToKeyEvents = function (domElement) {
        domElement.addEventListener("keydown", onKeyDown);
        this._domElementKeyEvents = domElement;
      };

      this.stopListenToKeyEvents = function () {
        this._domElementKeyEvents.removeEventListener("keydown", onKeyDown);
        this._domElementKeyEvents = null;
      };

      this.saveState = function () {
        scope.target0.copy(scope.target);
        scope.position0.copy(scope.object.position);
        scope.zoom0 = scope.object.zoom;
      };

      this.reset = function () {
        scope.target.copy(scope.target0);
        scope.object.position.copy(scope.position0);
        scope.object.zoom = scope.zoom0;

        scope.object.updateProjectionMatrix();
        scope.dispatchEvent(_changeEvent);

        scope.update();

        state = STATE.NONE;
      };

      // this method is exposed, but perhaps it would be better if we can make it private...
      this.update = (function () {
        const offset = new THREE.Vector3();

        // so camera.up is the orbit axis
        const quat = new THREE.Quaternion().setFromUnitVectors(object.up, new THREE.Vector3(0, 1, 0));
        const quatInverse = quat.clone().invert();

        const lastPosition = new THREE.Vector3();
        const lastQuaternion = new THREE.Quaternion();

        const twoPI = 2 * Math.PI;

        return function update() {
          const position = scope.object.position;

          offset.copy(position).sub(scope.target);

          // rotate offset to "y-axis-is-up" space
          offset.applyQuaternion(quat);

          // angle from z-axis around y-axis
          spherical.setFromVector3(offset);

          if (scope.autoRotate && state === STATE.NONE) {
            rotateLeft(getAutoRotationAngle());
          }

          if (scope.enableDamping) {
            spherical.theta += sphericalDelta.theta * scope.dampingFactor;
            spherical.phi += sphericalDelta.phi * scope.dampingFactor;
          } else {
            spherical.theta += sphericalDelta.theta;
            spherical.phi += sphericalDelta.phi;
          }

          // restrict theta to be between desired limits

          let min = scope.minAzimuthAngle;
          let max = scope.maxAzimuthAngle;

          if (isFinite(min) && isFinite(max)) {
            if (min < -Math.PI) min += twoPI;
            else if (min > Math.PI) min -= twoPI;

            if (max < -Math.PI) max += twoPI;
            else if (max > Math.PI) max -= twoPI;

            if (min <= max) {
              spherical.theta = Math.max(min, Math.min(max, spherical.theta));
            } else {
              spherical.theta =
                spherical.theta > (min + max) / 2 ? Math.max(min, spherical.theta) : Math.min(max, spherical.theta);
            }
          }

          // restrict phi to be between desired limits
          spherical.phi = Math.max(scope.minPolarAngle, Math.min(scope.maxPolarAngle, spherical.phi));

          spherical.makeSafe();

          spherical.radius *= scale;

          // restrict radius to be between desired limits
          spherical.radius = Math.max(scope.minDistance, Math.min(scope.maxDistance, spherical.radius));

          // move target to panned location

          if (scope.enableDamping === true) {
            scope.target.addScaledVector(panOffset, scope.dampingFactor);
          } else {
            scope.target.add(panOffset);
          }

          offset.setFromSpherical(spherical);

          // rotate offset back to "camera-up-vector-is-up" space
          offset.applyQuaternion(quatInverse);

          position.copy(scope.target).add(offset);

          scope.object.lookAt(scope.target);

          if (scope.enableDamping === true) {
            sphericalDelta.theta *= 1 - scope.dampingFactor;
            sphericalDelta.phi *= 1 - scope.dampingFactor;

            panOffset.multiplyScalar(1 - scope.dampingFactor);
          } else {
            sphericalDelta.set(0, 0, 0);

            panOffset.set(0, 0, 0);
          }

          scale = 1;

          // update condition is:
          // min(camera displacement, camera rotation in radians)^2 > EPS
          // using small-angle approximation cos(x/2) = 1 - x^2 / 8

          if (
            zoomChanged ||
            lastPosition.distanceToSquared(scope.object.position) > EPS ||
            8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS
          ) {
            scope.dispatchEvent(_changeEvent);

            lastPosition.copy(scope.object.position);
            lastQuaternion.copy(scope.object.quaternion);
            zoomChanged = false;

            return true;
          }

          return false;
        };
      })();

      this.dispose = function () {
        scope.domElement.removeEventListener("contextmenu", onContextMenu);

        scope.domElement.removeEventListener("pointerdown", onPointerDown);
        scope.domElement.removeEventListener("pointercancel", onPointerCancel);
        scope.domElement.removeEventListener("wheel", onMouseWheel);

        scope.domElement.removeEventListener("pointermove", onPointerMove);
        scope.domElement.removeEventListener("pointerup", onPointerUp);

        if (scope._domElementKeyEvents !== null) {
          scope._domElementKeyEvents.removeEventListener("keydown", onKeyDown);
          scope._domElementKeyEvents = null;
        }

        //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
      };

      //
      // internals
      //

      const scope = this;

      const STATE = {
        NONE: -1,
        ROTATE: 0,
        DOLLY: 1,
        PAN: 2,
        TOUCH_ROTATE: 3,
        TOUCH_PAN: 4,
        TOUCH_DOLLY_PAN: 5,
        TOUCH_DOLLY_ROTATE: 6,
      };

      let state = STATE.NONE;

      const EPS = 0.000001;

      // current position in spherical coordinates
      const spherical = new THREE.Spherical();
      const sphericalDelta = new THREE.Spherical();

      let scale = 1;
      const panOffset = new THREE.Vector3();
      let zoomChanged = false;

      const rotateStart = new THREE.Vector2();
      const rotateEnd = new THREE.Vector2();
      const rotateDelta = new THREE.Vector2();

      const panStart = new THREE.Vector2();
      const panEnd = new THREE.Vector2();
      const panDelta = new THREE.Vector2();

      const dollyStart = new THREE.Vector2();
      const dollyEnd = new THREE.Vector2();
      const dollyDelta = new THREE.Vector2();

      const pointers = [];
      const pointerPositions = {};

      function getAutoRotationAngle() {
        return ((2 * Math.PI) / 60 / 60) * scope.autoRotateSpeed;
      }

      function getZoomScale() {
        return Math.pow(0.95, scope.zoomSpeed);
      }

      function rotateLeft(angle) {
        sphericalDelta.theta -= angle;
      }

      function rotateUp(angle) {
        sphericalDelta.phi -= angle;
      }

      const panLeft = (function () {
        const v = new THREE.Vector3();

        return function panLeft(distance, objectMatrix) {
          v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix
          v.multiplyScalar(-distance);

          panOffset.add(v);
        };
      })();

      const panUp = (function () {
        const v = new THREE.Vector3();

        return function panUp(distance, objectMatrix) {
          if (scope.screenSpacePanning === true) {
            v.setFromMatrixColumn(objectMatrix, 1);
          } else {
            v.setFromMatrixColumn(objectMatrix, 0);
            v.crossVectors(scope.object.up, v);
          }

          v.multiplyScalar(distance);

          panOffset.add(v);
        };
      })();

      // deltaX and deltaY are in pixels; right and down are positive
      const pan = (function () {
        const offset = new THREE.Vector3();

        return function pan(deltaX, deltaY) {
          const element = scope.domElement;

          if (scope.object.isPerspectiveCamera) {
            // perspective
            const position = scope.object.position;
            offset.copy(position).sub(scope.target);
            let targetDistance = offset.length();

            // half of the fov is center to top of screen
            targetDistance *= Math.tan(((scope.object.fov / 2) * Math.PI) / 180.0);

            // we use only clientHeight here so aspect ratio does not distort speed
            panLeft((2 * deltaX * targetDistance) / element.clientHeight, scope.object.matrix);
            panUp((2 * deltaY * targetDistance) / element.clientHeight, scope.object.matrix);
          } else if (scope.object.isOrthographicCamera) {
            // orthographic
            panLeft(
              (deltaX * (scope.object.right - scope.object.left)) / scope.object.zoom / element.clientWidth,
              scope.object.matrix
            );
            panUp(
              (deltaY * (scope.object.top - scope.object.bottom)) / scope.object.zoom / element.clientHeight,
              scope.object.matrix
            );
          } else {
            // camera neither orthographic nor perspective
            console.warn("WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.");
            scope.enablePan = false;
          }
        };
      })();

      function dollyOut(dollyScale) {
        if (scope.object.isPerspectiveCamera) {
          scale /= dollyScale;
        } else if (scope.object.isOrthographicCamera) {
          scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom * dollyScale));
          scope.object.updateProjectionMatrix();
          zoomChanged = true;
        } else {
          console.warn("WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.");
          scope.enableZoom = false;
        }
      }

      function dollyIn(dollyScale) {
        if (scope.object.isPerspectiveCamera) {
          scale *= dollyScale;
        } else if (scope.object.isOrthographicCamera) {
          scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / dollyScale));
          scope.object.updateProjectionMatrix();
          zoomChanged = true;
        } else {
          console.warn("WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.");
          scope.enableZoom = false;
        }
      }

      //
      // event callbacks - update the object state
      //

      function handleMouseDownRotate(event) {
        rotateStart.set(event.clientX, event.clientY);
      }

      function handleMouseDownDolly(event) {
        dollyStart.set(event.clientX, event.clientY);
      }

      function handleMouseDownPan(event) {
        panStart.set(event.clientX, event.clientY);
      }

      function handleMouseMoveRotate(event) {
        rotateEnd.set(event.clientX, event.clientY);

        rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);

        const element = scope.domElement;

        rotateLeft((2 * Math.PI * rotateDelta.x) / element.clientHeight); // yes, height

        rotateUp((2 * Math.PI * rotateDelta.y) / element.clientHeight);

        rotateStart.copy(rotateEnd);

        scope.update();
      }

      function handleMouseMoveDolly(event) {
        dollyEnd.set(event.clientX, event.clientY);

        dollyDelta.subVectors(dollyEnd, dollyStart);

        if (dollyDelta.y > 0) {
          dollyOut(getZoomScale());
        } else if (dollyDelta.y < 0) {
          dollyIn(getZoomScale());
        }

        dollyStart.copy(dollyEnd);

        scope.update();
      }

      function handleMouseMovePan(event) {
        panEnd.set(event.clientX, event.clientY);

        panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);

        pan(panDelta.x, panDelta.y);

        panStart.copy(panEnd);

        scope.update();
      }

      function handleMouseWheel(event) {
        if (event.deltaY < 0) {
          dollyIn(getZoomScale());
        } else if (event.deltaY > 0) {
          dollyOut(getZoomScale());
        }

        scope.update();
      }

      function handleKeyDown(event) {
        let needsUpdate = false;

        switch (event.code) {
          case scope.keys.UP:
            if (event.ctrlKey || event.metaKey || event.shiftKey) {
              rotateUp((2 * Math.PI * scope.rotateSpeed) / scope.domElement.clientHeight);
            } else {
              pan(0, scope.keyPanSpeed);
            }

            needsUpdate = true;
            break;

          case scope.keys.BOTTOM:
            if (event.ctrlKey || event.metaKey || event.shiftKey) {
              rotateUp((-2 * Math.PI * scope.rotateSpeed) / scope.domElement.clientHeight);
            } else {
              pan(0, -scope.keyPanSpeed);
            }

            needsUpdate = true;
            break;

          case scope.keys.LEFT:
            if (event.ctrlKey || event.metaKey || event.shiftKey) {
              rotateLeft((2 * Math.PI * scope.rotateSpeed) / scope.domElement.clientHeight);
            } else {
              pan(scope.keyPanSpeed, 0);
            }

            needsUpdate = true;
            break;

          case scope.keys.RIGHT:
            if (event.ctrlKey || event.metaKey || event.shiftKey) {
              rotateLeft((-2 * Math.PI * scope.rotateSpeed) / scope.domElement.clientHeight);
            } else {
              pan(-scope.keyPanSpeed, 0);
            }

            needsUpdate = true;
            break;
        }

        if (needsUpdate) {
          // prevent the browser from scrolling on cursor keys
          event.preventDefault();

          scope.update();
        }
      }

      function handleTouchStartRotate() {
        if (pointers.length === 1) {
          rotateStart.set(pointers[0].pageX, pointers[0].pageY);
        } else {
          const x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
          const y = 0.5 * (pointers[0].pageY + pointers[1].pageY);

          rotateStart.set(x, y);
        }
      }

      function handleTouchStartPan() {
        if (pointers.length === 1) {
          panStart.set(pointers[0].pageX, pointers[0].pageY);
        } else {
          const x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
          const y = 0.5 * (pointers[0].pageY + pointers[1].pageY);

          panStart.set(x, y);
        }
      }

      function handleTouchStartDolly() {
        const dx = pointers[0].pageX - pointers[1].pageX;
        const dy = pointers[0].pageY - pointers[1].pageY;

        const distance = Math.sqrt(dx * dx + dy * dy);

        dollyStart.set(0, distance);
      }

      function handleTouchStartDollyPan() {
        if (scope.enableZoom) handleTouchStartDolly();

        if (scope.enablePan) handleTouchStartPan();
      }

      function handleTouchStartDollyRotate() {
        if (scope.enableZoom) handleTouchStartDolly();

        if (scope.enableRotate) handleTouchStartRotate();
      }

      function handleTouchMoveRotate(event) {
        if (pointers.length == 1) {
          rotateEnd.set(event.pageX, event.pageY);
        } else {
          const position = getSecondPointerPosition(event);

          const x = 0.5 * (event.pageX + position.x);
          const y = 0.5 * (event.pageY + position.y);

          rotateEnd.set(x, y);
        }

        rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);

        const element = scope.domElement;

        rotateLeft((2 * Math.PI * rotateDelta.x) / element.clientHeight); // yes, height

        rotateUp((2 * Math.PI * rotateDelta.y) / element.clientHeight);

        rotateStart.copy(rotateEnd);
      }

      function handleTouchMovePan(event) {
        if (pointers.length === 1) {
          panEnd.set(event.pageX, event.pageY);
        } else {
          const position = getSecondPointerPosition(event);

          const x = 0.5 * (event.pageX + position.x);
          const y = 0.5 * (event.pageY + position.y);

          panEnd.set(x, y);
        }

        panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);

        pan(panDelta.x, panDelta.y);

        panStart.copy(panEnd);
      }

      function handleTouchMoveDolly(event) {
        const position = getSecondPointerPosition(event);

        const dx = event.pageX - position.x;
        const dy = event.pageY - position.y;

        const distance = Math.sqrt(dx * dx + dy * dy);

        dollyEnd.set(0, distance);

        dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed));

        dollyOut(dollyDelta.y);

        dollyStart.copy(dollyEnd);
      }

      function handleTouchMoveDollyPan(event) {
        if (scope.enableZoom) handleTouchMoveDolly(event);

        if (scope.enablePan) handleTouchMovePan(event);
      }

      function handleTouchMoveDollyRotate(event) {
        if (scope.enableZoom) handleTouchMoveDolly(event);

        if (scope.enableRotate) handleTouchMoveRotate(event);
      }

      //
      // event handlers - FSM: listen for events and reset state
      //

      function onPointerDown(event) {
        if (scope.enabled === false) return;

        if (pointers.length === 0) {
          scope.domElement.setPointerCapture(event.pointerId);

          scope.domElement.addEventListener("pointermove", onPointerMove);
          scope.domElement.addEventListener("pointerup", onPointerUp);
        }

        //

        addPointer(event);

        if (event.pointerType === "touch") {
          onTouchStart(event);
        } else {
          onMouseDown(event);
        }
      }

      function onPointerMove(event) {
        if (scope.enabled === false) return;

        if (event.pointerType === "touch") {
          onTouchMove(event);
        } else {
          onMouseMove(event);
        }
      }

      function onPointerUp(event) {
        removePointer(event);

        if (pointers.length === 0) {
          scope.domElement.releasePointerCapture(event.pointerId);

          scope.domElement.removeEventListener("pointermove", onPointerMove);
          scope.domElement.removeEventListener("pointerup", onPointerUp);
        }

        scope.dispatchEvent(_endEvent);

        state = STATE.NONE;
      }

      function onPointerCancel(event) {
        removePointer(event);
      }

      function onMouseDown(event) {
        let mouseAction;

        switch (event.button) {
          case 0:
            mouseAction = scope.mouseButtons.LEFT;
            break;

          case 1:
            mouseAction = scope.mouseButtons.MIDDLE;
            break;

          case 2:
            mouseAction = scope.mouseButtons.RIGHT;
            break;

          default:
            mouseAction = -1;
        }

        switch (mouseAction) {
          case THREE.MOUSE.DOLLY:
            if (scope.enableZoom === false) return;

            handleMouseDownDolly(event);

            state = STATE.DOLLY;

            break;

          case THREE.MOUSE.ROTATE:
            if (event.ctrlKey || event.metaKey || event.shiftKey) {
              if (scope.enablePan === false) return;

              handleMouseDownPan(event);

              state = STATE.PAN;
            } else {
              if (scope.enableRotate === false) return;

              handleMouseDownRotate(event);

              state = STATE.ROTATE;
            }

            break;

          case THREE.MOUSE.PAN:
            if (event.ctrlKey || event.metaKey || event.shiftKey) {
              if (scope.enableRotate === false) return;

              handleMouseDownRotate(event);

              state = STATE.ROTATE;
            } else {
              if (scope.enablePan === false) return;

              handleMouseDownPan(event);

              state = STATE.PAN;
            }

            break;

          default:
            state = STATE.NONE;
        }

        if (state !== STATE.NONE) {
          scope.dispatchEvent(_startEvent);
        }
      }

      function onMouseMove(event) {
        switch (state) {
          case STATE.ROTATE:
            if (scope.enableRotate === false) return;

            handleMouseMoveRotate(event);

            break;

          case STATE.DOLLY:
            if (scope.enableZoom === false) return;

            handleMouseMoveDolly(event);

            break;

          case STATE.PAN:
            if (scope.enablePan === false) return;

            handleMouseMovePan(event);

            break;
        }
      }

      function onMouseWheel(event) {
        if (scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE) return;

        event.preventDefault();

        scope.dispatchEvent(_startEvent);

        handleMouseWheel(event);

        scope.dispatchEvent(_endEvent);
      }

      function onKeyDown(event) {
        if (scope.enabled === false || scope.enablePan === false) return;

        handleKeyDown(event);
      }

      function onTouchStart(event) {
        trackPointer(event);

        switch (pointers.length) {
          case 1:
            switch (scope.touches.ONE) {
              case THREE.TOUCH.ROTATE:
                if (scope.enableRotate === false) return;

                handleTouchStartRotate();

                state = STATE.TOUCH_ROTATE;

                break;

              case THREE.TOUCH.PAN:
                if (scope.enablePan === false) return;

                handleTouchStartPan();

                state = STATE.TOUCH_PAN;

                break;

              default:
                state = STATE.NONE;
            }

            break;

          case 2:
            switch (scope.touches.TWO) {
              case THREE.TOUCH.DOLLY_PAN:
                if (scope.enableZoom === false && scope.enablePan === false) return;

                handleTouchStartDollyPan();

                state = STATE.TOUCH_DOLLY_PAN;

                break;

              case THREE.TOUCH.DOLLY_ROTATE:
                if (scope.enableZoom === false && scope.enableRotate === false) return;

                handleTouchStartDollyRotate();

                state = STATE.TOUCH_DOLLY_ROTATE;

                break;

              default:
                state = STATE.NONE;
            }

            break;

          default:
            state = STATE.NONE;
        }

        if (state !== STATE.NONE) {
          scope.dispatchEvent(_startEvent);
        }
      }

      function onTouchMove(event) {
        trackPointer(event);

        switch (state) {
          case STATE.TOUCH_ROTATE:
            if (scope.enableRotate === false) return;

            handleTouchMoveRotate(event);

            scope.update();

            break;

          case STATE.TOUCH_PAN:
            if (scope.enablePan === false) return;

            handleTouchMovePan(event);

            scope.update();

            break;

          case STATE.TOUCH_DOLLY_PAN:
            if (scope.enableZoom === false && scope.enablePan === false) return;

            handleTouchMoveDollyPan(event);

            scope.update();

            break;

          case STATE.TOUCH_DOLLY_ROTATE:
            if (scope.enableZoom === false && scope.enableRotate === false) return;

            handleTouchMoveDollyRotate(event);

            scope.update();

            break;

          default:
            state = STATE.NONE;
        }
      }

      function onContextMenu(event) {
        if (scope.enabled === false) return;

        event.preventDefault();
      }

      function addPointer(event) {
        pointers.push(event);
      }

      function removePointer(event) {
        delete pointerPositions[event.pointerId];

        for (let i = 0; i < pointers.length; i++) {
          if (pointers[i].pointerId == event.pointerId) {
            pointers.splice(i, 1);
            return;
          }
        }
      }

      function trackPointer(event) {
        let position = pointerPositions[event.pointerId];

        if (position === undefined) {
          position = new THREE.Vector2();
          pointerPositions[event.pointerId] = position;
        }

        position.set(event.pageX, event.pageY);
      }

      function getSecondPointerPosition(event) {
        const pointer = event.pointerId === pointers[0].pointerId ? pointers[1] : pointers[0];

        return pointerPositions[pointer.pointerId];
      }

      //

      scope.domElement.addEventListener("contextmenu", onContextMenu);

      scope.domElement.addEventListener("pointerdown", onPointerDown);
      scope.domElement.addEventListener("pointercancel", onPointerCancel);
      scope.domElement.addEventListener("wheel", onMouseWheel, { passive: false });

      // force an update at start

      this.update();
    }
  }

  // This set of controls performs orbiting, dollying (zooming), and panning.
  // Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
  // This is very similar to OrbitControls, another set of touch behavior
  //
  //    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
  //    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
  //    Pan - left mouse, or arrow keys / touch: one-finger move

  class MapControls extends OrbitControls {
    constructor(object, domElement) {
      super(object, domElement);

      this.screenSpacePanning = false; // pan orthogonal to world-space direction camera.up

      this.mouseButtons.LEFT = THREE.MOUSE.PAN;
      this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;

      this.touches.ONE = THREE.TOUCH.PAN;
      this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;
    }
  }

  THREE.MapControls = MapControls;
  THREE.OrbitControls = OrbitControls;
})();
